Ticks are some of the most prolific vampires on Earth, capable of drinking up to 600 times their body weight in blood thanks to a stretchable outer shell (pictured at left). They prefer warm, wooded areas near water, and while they rely on a range of tactics to find food — some wait in tall grass, while others hunt for hosts — they all use similarly vicious teeth, claws and feeding tubes to dig in once they find it.
A tick bite won't turn you into a vampire, but it can spread illnesses like Lyme disease, so act quickly if you're bitten — and even after removing the tick with tweezers (pictured at right) and killing it, you may want to keep it for a few days as evidence in case you get sick. (Illustration: CDC)
For more about how ticks transmit Lyme disease, see the video below: